Fix apt-get update “the following signatures couldn’t be verified because the public key is not available”

将系统的镜像环境切换成清华大学镜像源

ubuntu | 镜像站使用帮助 | 清华大学开源软件镜像站 | Tsinghua Open Source Mirror

执行命令

apt-get update

报错。

解决办法：

apt-key adv --keyserver keyserver.ubuntu.com --recv-keys  3B4FE6ACC0B21F32
apt-key adv --keyserver keyserver.ubuntu.com --recv-keys  871920D1991BC93C

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apt-get update “the following signatures couldn’t be verified because the public key is not avail

Fix apt-get update “the following signatures couldn’t be verified because the public key is not available”

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